Received 7 December 2012
aUniversidade Federal de São Carlos, Departamento de Química, CP 676, CEP 13565-905, São Carlos/SP, Brazil,bUniversidade Federal de Goias, Instituto de Química, Campus Samambaia, CP 131, CEP 74001-970, Goiania/GO, Brazil,cUniversidade Federal de Alagoas, Centro de Ciências Exatas e Naturais, Departamento de Química, CEP 57072-970, Maceió/AL, Brazil, and dUniversidade de São Paulo, Instituto de Física de Sao Carlos, CP 369, CEP 13560-970, São Carlos/SP, Brazil
Correspondence e-mail: email@example.com
In the title complex, [Ru(C10H8N2)2(C5H6N2)2](PF6)2·CH3CN, the RuII atom is bonded to two -diimine ligands, viz. 2,2'-bipyridine, in a cis configuration and to two 4-aminopyridine (4Apy) ligands in the expected distorted octahedral configuration. The compound is isostructural with [Ru(C10H8N2)2(C5H6N2)2](ClO4)2·CH3CN [Duan et al. (1999). J. Coord. Chem. 46, 301-312] and both structures are stabilized by classical hydrogen bonds between 4Apy ligands as donors and counter-ions and acetonitrile solvent molecules as acceptors. Indeed, N-HF interactions give rise to an intermolecularly locked assembly of two centrosymmetric complex molecules and two PF6- counter-ions, which can be considered as the building units of both crystal architectures. The building blocks are connected to one another through hydrogen bonds between 4Apy and the connecting pieces made up of two centrosymmetric motifs with PF6- ions and acetonitrile molecules, giving rise to ribbons running parallel to . 21-Screw-axis-related complex molecules and PF6- counter-ions alternate in helical chains formed along the a axis by means of these contacts.
For compounds with similar properties, see: Stoyanov et al. (2002); Duan et al. (1999); Salassa et al. (2009). For use of 4Apy, see: Sinha & Shrivastava (2012). For the synthesis of the starting materials, see: Bonneson et al. (1983).
Data collection: COLLECT (Nonius, 2000); cell refinement: SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO (Otwinowski & Minor, 1997) and SCALEPACK; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and Mercury (Macrae et al., 2006); software used to prepare material for publication: WinGX (Farrugia, 2012).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BG2496 ).
The authors wish to thank FAPESP (Proc. 2009/08218-0; 2008/52859-7), CNPq (Universal 470890/2010-0) and CAPES for the grants and fellowships given to this research.
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